In their most recent 10-year budget and economic forecast, the CBO made a big change, reducing their long-run forecast of the interest rate on government bonds by almost a full percentage point, from 3.7 to 2.9. Most directly, the new, lower interest rate reduces expected debt payments over the next decade by $2.2 trillion. It also significantly reduces the expected debt-GDP ratio. Under the assumptions the CBO was using at the start of this year, the debt ratio under existing policy...
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